Description

Polyethylene terephthalate (PET) is a thermoplastic polymer resin of the polyester family and is used in synthetic fibers, beverage, food and other liquid containers, thermoforming applications and engineering resins. Depending on its processing and thermal history, PET may exist both as an amorphous and as a semi-crystalline polymer. Polymerization is through a polycondensation reaction of the monomer ethylene terephthalate with water as the byproduct.The majority of the world's PET production is for synthetic fibers with bottle production accounting for around 30% of global demand. The polyester industry makes up about 18% of world polymer production and is third after polyethylene (PE) and polypropylene (PP). Mechanical recycling of PET becomes more and more economically valuable due to the growing environmental awareness of the (Western) customer. The possibility of using recycled PET which will come into contact with food creates the need to develop efficient and sensitive analytical methods applicable to the identification and quantification of contaminants from recycled PET, which would also evidence that this recycled material complies with the terms of legislation. The recycling processes of PET for direct food contact have to evidence efficiency of contaminant removal and ensure consumer protection.

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